Illicit Discharges & Spills

Our actions within our watershed have a direct impact on our lakes, streams, wetlands and the Puget Sound. The City of Duvall and local environmental groups are making a significant effort to restore the local streams and protect our remaining aquatic habitat. Please do your part in keeping our waterways healthy by helping us keep an eye out for illegal activity which can damage water quality.

How can you help?

  • Never dump anything down a storm drain.
  • Dispose of yard and pet waste properly.
  • Avoid excess use of lawn fertilizer.
  • Wash your car on your lawn or at a car wash facility.
  • De-chlorinate pool water before draining.
  • Dispose of paint, and other household chemical according to label directions.
  • Take unwanted oil, paint, gasoline, and other toxic wastes to a household hazardous waste site or recycling center.
  • Make sure sanitary, laundry, car wash, and industrial wastes don't drain to the storm sewer.
  • Report illicit discharges to the reporting line: 425.939.8040, emergency after hours: 425.419.3748 or Email (non-emergency only).
Reporting Discharges & Spills
Please do your part in helping to protect our natural waterways. Report any spill, illicit discharges or illicit connections to our natural waterways or storm system by calling the city’s spill hotline. City staff understands the need for confidentiality, so calls can be anonymous. However, please provide as much detail as possible about the spill or illegal activity including the date, time, location, a description of the spill or illegal activity and a description of the pollutant.

All city storm drains flow into natural waterways. So it is very important to report illegal dumping or even accidental spills in our roadways, storm systems or natural waterways.

Illicit Discharges

An illicit discharge to a stormwater system is the discharge of pollutants or non-stormwater materials to storm systems via overland flow or direct dumping of materials into a storm drain. Some examples of illicit discharges include run-off car washing or dumping motor oil, antifreeze or paint in or around a street or storm drain.
Storm Pipe_Creek Illustration
Illicit Connections
An illicit connection to a stormwater system is the discharge of pollutants or non-stormwater materials into a storm system (pipes, catch basins, ditches, etc.) via a pipe or other direct connection. Sources of illicit connections may include sanitary sewer taps, wash water from laundromats, car washes, or restaurants and other similar sources.
Storm Drain Illustration